Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Idiosyncratic Volatility Puzzle Explained by Individual Traders in Korea Stock Market

한국주식시장의 고유변동성 퍼즐과 투자자별 거래량

  • Jung, Youra (Business Administration, Chung-Ang University) ;
  • Yoo, Shiyong (Business Administration, Chung-Ang University)
  • Received : 2015.07.28
  • Accepted : 2015.10.08
  • Published : 2015.10.31
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Abstract

This paper examines the relationship between idiosyncratic volatility(IVOL) puzzle and trading volumes by trader types in the Korean stock market. The data set includes all stock in both KRX and KOSDAQ for the period from January 1999 through December 2013. Idiosyncratic volatility is measured by using the Fama-French's three-factor model. Traders are classified into individual, institution, and foreign trader. We construct (5X5) portfolios based on each trader's net buying and idiosyncratic volatility. We find that there are some special portfolios that show the idiosyncratic volatility puzzle. For individual investors, top net buying portfolios show clear the idiosyncratic volatility puzzle. However, for institution and foreign investors, lowest net buying portfolio show the idiosyncratic volatility puzzle. This results imply that the idiosyncratic volatility puzzle in the Korean stock market is mainly caused by individual investors.

본 연구는 한국주식시장의 고유변동성퍼즐 현상과 투자자별 거래량에 관하여 분석하였다. 먼저 1999년 1월부터 2013년 12월까지 한국거래소에 상장된 주식들을 FF-3요인 모형으로 고유변동성을 추정하고, 투자자별 순매수와 고유변동성을 기준으로 포트폴리오를 구성하였다. 유가증권(KRX)과 코스닥(KOSDAQ)을 포함시켜 1999년 1월부터 2013년 12월까지의 일별과 월별 자료를 사용하여 분석하였다. 투자자는 개인, 기관, 그리고 외국인으로 구분하였다. 결과, 고유변동성과 알파값(혹은 초과수익률) 간에 부(-)의 관계를 나타내는 고유변동성퍼즐 현상이 뚜렷하게 나타난 특정 포트폴리오들이 발견되었다. 특히 개인투자자의 순매수를 기준으로 분류한 포트폴리오의 경우, 최상위 순매수 포트폴리오들이 뚜렷한 고유변동성퍼즐 현상을 보였다. 그리고 기관 및 외국인의 경우, 최하위 순매수 포트폴리오들에서 고유변동성퍼즐 현상이 나타났다. 따라서, 국내 주식시장에서 개인투자자의 주식거래가 압도적으로 많은 상황에서, 고유변동성퍼즐은 주로 개인투자자에 의해서 발생했다고 할 수 있다.

Keywords

References

  1. Ang, A., R. J. Hodrick, Y. Xing, and X. Zhang., "The Cross-Section of Volatility and Expected Returns", Journal of Finance 61(1), pp. 259-299, 2006. DOI: http://dx.doi.org/10.1111/j.1540-6261.2006.00836.x
  2. Ang, A., R. J. Hodrick, Y. Xing, and X. Zhang., "High Idiosyncratic Volatility and Low Returns: International and Further U. S. Evidence", Journal of Financial Economics 91, pp. 1-23, 2009. DOI: http://dx.doi.org/10.1016/j.jfineco.2007.12.005
  3. Brandt, W. Brave, A. Graham, R. and Kumar, A., "The Idiosyncratic Volatility Puzzle: Time Trend or Speculative Episodes?", The Review of Financial Studies 23, pp. 864-899, 2009.
  4. Eom, C. J., W. B. Lee, R. S. Park, Uk Chang, J. W. Park., "A Study on the Relationship between Idiosyncratic Volatility and Stock Returns in the Korean Stock Markets", Asia-Pacific Journal of Financial Studies 43(4), pp. 753-784, 2014.
  5. Fama, E. F. and K. R. French., "Common Risk Factors in the Returns on Stocks and Bonds", Journal of Financial Economics 33, pp. 3-56, 1993. DOI: http://dx.doi.org/10.1016/0304-405X(93)90023-5
  6. Hou K., and R. Loh., "Have We Solved the Idiosyncratic Volatility Puzzle?", Charles A. Dice Center Working Paper, 2012.
  7. Kho B, C., J, W. Kim., "Low Volatility Anomaly and Its Profitability in Korean Stock Markets." Asia-Pacific Journal of Financial Studies 40(3). PP.573-603, 2014.
  8. Kim S. C., J. Y. Kim., "Firm Size and Book-to-Market Factors in Korean Stock Returns", Asian Review of Financial Research 13(1), pp.21-47, 2000.
  9. Kim, T. h., Y. T. Byun,. "The Relationship between Idiosyncratic Volatility and Expected Returns in the Korea Stock Markets", Asia-Pacific Journal of Financial Studies 40(3), pp. 525-550, 2011.
  10. Markowitz, H., "Portfolio Selection." Journal of Finance 7(1). pp.77-91, 1952. DOI: http://dx.doi.org/10.2307/2975974
  11. Yun, S. Y., B. Ku, Y. H. Eom., "Empirical Investigation on the Relationship of Firm-Volatility and the Cross-section of Stock Returns", Asian Review of Financial Research 24(1), pp. 92-131, 2011.
  12. Xu, Y. and B. G. Malkiel., "Investigating the Behavior of Idiosyncratic Volatility", Journal of Business 76, pp. 613-644, 2003. DOI: http://dx.doi.org/10.1086/377033

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